Dentist&#39;s flask.



N. OPOTOW.

DENTISTS FLASK. APPLICATION HLED DEC. 6, 1911.

Paten Feb. 19, 1918.

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INVENTOR "figwm NATHAN OPOTOW, OF NEW YORK, N. Y.

DENTISTS rLAsK;

Specification of Letters Patent.

Patented Feb. 19, 1918.

Application filed. December 6, 1917. Serial No. 205,816.

T 0 all whom it may concern:

Be it known that I, NATHAN Oro'row, a citizen of Russia, and residing atNew York, in the county of Bronx and State of New York, have inventedcertain new and useful Improvements in Dentists Flasks, of which thefollowing is a specification, such as will enable those skilled in theart to which it appertains to make and use the same.

This invention relates to what are known as dental or dentists flasks,and the object thereof is to provide improved means for locking theseparate parts of a flask of this class together. and which may beconveniently manipulated for the purpose specified and also for thepurpose of disconnecting the parts of the flask, and with this and otherobjects in view the invention consists in the construction, combinationand arrangement of parts hereinafter described and claimed.

The invention is fully disclosed in the following specification, ofwhich the accompanying drawing forms a part, in which the separate partsof my improvement are des gnated by suitable reference characters ineach of the views, and in which Figure 1 is a plan view of a dentalflask V of wellknown general form and employing my improved means forlocking the parts thereof together;

Fig. 2 a side view of the flask as shown in Fig. 1;

Fig. 3 a partial section on the line 3-3 of Fig. 2;

Fig. 4 a view. similar to Fig. 3 but showing the parts in a differentposition;

Fig. 5 a partial section on the line 5-5 of Fig. 1;

Fig. (3 a view similar to Fig. 2 but'showmg only one part of the flask;

Fig. 7 a view similar to Fig. 6 but showing another part of the flask;

Fig. 8 a perspective view of a lock clamp which I employ; and

Fig. 9 a similar view of a supplemental look.

In the accompanying drawing, I have shown at a a dental flask of theform now in general use, and which comprises a bottom body part I), atop body part c and a cap plate (Z.

The top body part 0 is provided, in the construction shown, and in theopposite top edges thereof and in a plane which passes forwardly andbackwardly through the body ofthe flask with recesses 0 and the capproper position on the top body part c and to 1 reinforce said capplate.

The opposite sides of the bottom part I) of the flask is provided withangular lugs or projections 6 having upwardly directed contralextensions 6 and the top part c is provided with correspondinglugs orprojections 0 having downwardly directed extensions 0 which overlaptheconnection of the parts I) and 0 and are provided with recesses c toreceive the parts 6 The bottom part b of the flask is also providcd onits opposite sides with angular lugs or projections b", and the part 0is provided directly over the lugs or projections 21 with similar lugsor projections 0 and I also employ at the opposite sides of the flask,main clamp plates 6 provided at their upper ends with inwardly directedshoulders c and near their lower ends with angular apertures-c throughwhich the lugs or projections 11* pass, and above the angular aperturesc -the clamp plates e are also provided with other angular apertures ahaving upwardly and downwardly directed extensions or supplementalapertures e, and the lugs or pro ections 0" on the part c of the flaskpass through the angular apertures e and the clamp plates 6 are movableinwardly and outwardly on the lugs or projections b and c".

I also provide supplemental lock devices f which consist of angularblocks provided at their opposite ends with lugs or projections 7, andthe supplemental lock devices f are connected with the lugs orprojections c by screws g which are passed therethrough and the heads ofwhich are countersunk therein, and with this construction thesupplemental lock devices 7 may be turned on the screws 9, and when inthe transverse position shown in Fig. 2, they operate to bind the lockplates e in operative position as shown in Figs. 1, 2 and 3, and whensaid lock devices are in the position shown in Fig. 4:,

the clamp plates 6 may be moved outwardly into the position shown insaid figure, and the separate parts of the flask may be disconnected aswill be readily understood.

When it is desired to again lock the separate parts of the flasktogether, they are placed in their normal position as shown in Figs. 1,2 and 3, and the clamp plates 6 are moved inwardly into the positionshown in Fig. 3, and the supplemental lock devices f are turned into theposition shown in F ig..2.

With my improvement the separate parts of the flask when in use aresecurely locked against any movement, either radially, laterally orotherwise, and the use of springs or elastic connections of any kind isavoided, and when the separate parts of the flask are properly made andfitted together, said flask when in use will be practically sealedagainst the'passage therefrom or thereinto of either liquid or air.

The method of operating my improved flask will be fully understood byall those familiar with, or accustomed to operating devices of thisclass, and a detail description of such operation is, therefore, notnecessary.

Having fully described my invention, what I claim s new and desire tosecure by Letters Patent, is 2- 1. A dental flask of the usual form andcomposed of a bottom body portion, a top body portion, and a cap plate,the bottom body portion and the top body portion being provided at theiropposite sides with angular lugs or projections, vertically ar rangedclamp plates having angular apertures through which said lugs orprojections are adapted to pass and on which said clamp plates aremovable inwardly and outwardly, and supplemental lock devices rotatablymounted on the angular lugs or projections of the top body part andadapted to pass through the corresponding apertures in the clamp plates.

2. A dental flash of the usual form and composed of a bottom bodyportion, a top body portion, and a cap plate, the bottom body portionand the top body portion being provided at their opposite sides withlugs or projections, vertically arranged clamp plates having aperturesthrough which said lugs or projections are adapted to pass and on whichsaid clamp plates are movable inwardly and outwardly, and supplementallock devices rotatably mounted on the lugs or projections of the topbody part and adapted to pass through the corresponding apertures in theclamp plates.

3. A dental flask of the usual form and composed of a bottom bodyportion, a top body portion, and a cap plate, the bottom body portionand the top body portion being provided at their opposite sides withlugs or projections, vertically arranged clamp plates having aperturesthrough which said lugs or projections are adapted to pass and on whichsaid clamp plates are movable inwardly and outwardly, and supplementallock devices rotatably mounted on the lugs or projections of the topbody part and adapted to pass through the corresponding apertures in theclamp plates, said top and bottom portions of the flask beingalso'provided with interlocking lugs or projections.

4. A dental flask of the usual form and composed of a bottom body'portion, a top body portion, and a cap plate, the bottom body portionand the top body portion being provided at their opposite sides withlugs or projections, vertically arranged clamp plates having aperturesthrough which said lugs or projections are adapted to pass and on whichsaid clamp plates are movable inwardly and outwardly, and supplementallock devices rotatably mounted on the lugs or projections of the topbody part and adapted to pass through the corresponding apertures in theclamp plates, said top and bottom portions of the flask being alsoprovided with interlocking lugs or projections and the cap plate and topbody part being provided with other interlocking parts.

In testimony that I claim the foregoing as my invention I have signed myname in presence of the subscribing witnesses this 4th day of December,1917.

' NATHAN OPOTOW.

Witnesses:

C. E. MULREANY, H. E. TnoMrsoN.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner 01' lstents,

' Washington, D. C,

